This electric nail trimmer adopts grinding with bistrique,so it is definitely safe and gentle without pain.For use on fingernailsIt is specially applicable to old men,children and those people whose sight is not good. Safety use even close your eyes when use.Perfect for total body grooming.Water Resistance, Charger Base,Integrated with cut, trim, and polish.Fast charge within 2 hours.Charger : 100-240V AC 50-60HzOutput: 5V 1000mABattery: Lithium Battery 3.7V 1200mAhMotor: Large Torque MotorPower: 8WFull Charging Time: 2HDischarge Time: 60minUniversal Voltage: YesDetachble Blade: YesCharging Light: Circular on and off between a red light and two green lights when in charge. The three lights are all on when fully charged. Nail Port Specifications: Adult Nail,Thickness1.4mm Width 11mm.